Supplementary material Andrew Clegg, Birkbeck, University of London 22 March 2007 I have made the test data we used for this paper available from http://biotext.org.uk/ on the Downloads page. Competing interests I am one of the authors.
Supplementary material
22 March 2007
I have made the test data we used for this paper available from http://biotext.org.uk/ on the Downloads page.
Competing interests
I am one of the authors.